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puberty and the mistral cycle & adrenaline and thyroxine (menstrual…
puberty and the mistral cycle & adrenaline and thyroxine
hormones promote sexual characteristics at puberty
in men the main reproductive hormones is testosterone its produced by the tests and stimulates sperm production
in a woman the main hormones is oestrogen its produced by the ovaries as well as bringing about physical changes oestrogen is also involved in the menstrual cycle
menstrual cycle and the stages
stage 2
the uterus lining building up again from day 4 to day 14 into a thick spongy layer full of blood vessels ready to receive a fertilising egg
stage 3
an egg develops and is released from the ovaries at day 14 this is called ovulation
stage 1
day 1-menstruction starts the uterus lining breaks down for about four days
stage 4
the walk is then maintained for about 14 days until day 28 if no fertilised egg has landed on the uterus wall by day 28 he spongy lining starts to break down and the whole cycle starts again
menstrual cycle is controlled by the four hormones
oestrogen
2) causes the lining of the uterus to grow
3) stimulates the release of lh and inhibits releases fsh
1) produces in the ovaries
LH luteinising hormone
2) stimulates the relapse of an egg at day 14 ovulation
1) produced by the pituitary gland
FSH follicle stimulating hormone
2)causes an egg to mature in one of the ovaries in a structure called a follicle
3) stimulates the ovaries to produce oestrogen
1) produced in the pituitary gland
progesterone
2) maintains the lining of the uterus during the second half of the cycle when the level of progesterone falls the lining breaks down
3) inhibits the relases of lh and fsh
1) produces in the ovaries by the remaining of the follicle after ovulation
adrenaline prepares you for the fight or flight
2) adrenaline is released in response to stressful or scary situation your brain detects fear or stress and send nervous impulses to the adrenal glands which responds by secreting adrenaline
3) ot gets the body ready for a fight or flight by triggering mechanisms that increases the supply of oxygen and glucose to cells in the brain and muscles
1) adrenaline is a hormone releases by the adrenaline gland which are above the kidney
thyroxine regulates metabolisms
1) thyroxine is a hormone released by the thyroid gland which is in the neck
2) it plays an important role in regulating the basal metabolic rate the speed at which chemicals reactions in the body occurs while the body is at rest
3) thyroxine is released in response to thyroid stimulating hormone which is released from the pituitary gland